SOIGNIES (BE)
Quarry blast29 March 2023
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:03:112023-03-29
- UTC
- 10:03:112023-03-29
Main parameters
| Date and time | 2023-03-29 10:03:11 UTC 2023-03-29 12:03:11 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.582° N, 4.095° E Uncertainty ± 2.1 km |
| Event ID | ROB 19230 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2023-04-06 18:54:30 Belgian time
Location map
- Epicentre
- Station that recorded the event
Arrival times at the stations
Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.
- Stations
- 7
- Epicentral distance
- 7.5 – 135.6km
- Mean velocity, P wave
- 5.9km/s
- P wave
- S wave
- Curve fitted to the measurements
Notes and method
Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 6 measurements, root-mean-square deviation 0.15 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
Station measurements
P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.
| km | ° | UTC | UTC | s | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)7 stations | |||||
| SKQSteenkerque | 7.5 | 352 | 10:03:13.24+1.27 s | 10:03:14.62+2.65 s | 1.38 |
| RQRRonquières | 9.6 | 74 | 10:03:14.09+2.12 s | – | – |
| BRQBracquegnies | 11.6 | 165 | 10:03:14.15+2.18 s | – | – |
| SNFSeneffe | 15.6 | 120 | 10:03:14.75+2.78 s | 10:03:17.01+5.04 s | 2.26 |
| TGATangissart | 30.3 | 85 | 10:03:17.24+5.27 s | 10:03:20.33+8.36 s | 3.09 |
| CLAClavier | 87.5 | 101 | 10:03:27.10+15.13 s | – | – |
| MEMSMembach | 135.6 | 88 | 10:03:36.25+24.28 s | – | – |